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Portail > Offres > Offre UMR5221-ISAPHI-016 - Post-doctorat de deux ans sur le développement d'un imageur de champ électrique basé sur un spin électronique individuel (H/F)

Two-year post-doctorate position on nanoscale electric field imaging with a single spin sensor (W/M)

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : lundi 31 janvier 2022

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General information

Reference : UMR5221-ISAPHI-016
Workplace : MONTPELLIER
Date of publication : Monday, January 10, 2022
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 28 January 2022
Proportion of work : Full time
Remuneration : Around 2150 euros net
Desired level of education : PhD
Experience required : Indifferent

Missions

The goal of the project is to extend the functionalities of NV-based quantum microscopes towards the detection of electric fields at the nanoscale. A single NV defect hosted at the apex of a nanopillar in a diamond scanning-probe unit will be integrated into an atomic force microscope and scanned in close proximity of a sample. At each point of the scan, a quantitative electric field measurement will be performed by recording the Stark shift of the NV defect's electron spin sublevels through optical detection of the electron spin resonance. The first task of the project will be to precisely assess the electric field sensitivity of the single spin electrometer. Since the sensitivity of the NV defect to electric field is expected smaller than its sensitivity to magnetic fields, we will design measurement protocols based on spin echo sequences, which allow the detection of weak AC signals. After a careful characterization of the performances of the NV-based electrometer, the second task will be to demonstrate the capability of NV-based electrometry for imaging domain walls in ferroelectric materials like BaTiO3. We will then investigate more complex polar textures like domain walls with alternating rotation angles and topological polar states like ferroelectric skyrmions, which are currently attracting a high interest for the design of innovative microelectronic devices.

Activities

The candidate will carry out an experimental work. He/she will characterize the performances of a single NV center for electric field sensing. Using an experimental setup combining an atomic force microscope and a confocal optical microscope optimized for single NV defect spectroscopy, he/she will perform the first scanning electrometry experiments and study the physics of polar structures in ferroelectric materials.

Skills

- PhD degree in physics with a solid background in quantum physics and quantum technologies
- Extensive experience on the study of point defects in semiconductors
- Experience in scanning confocal microscopy and optically detected magnetic resonance techniques
- English speaking, reading and writing is mandatory
- Good communication skills and ability to work in a team

Work Context

This project will be pursued within the team “Solid-State Quantum Technologies” at the Laboratoire Charles Coulomb (L2C, UMR5221) in Montpellier. This post-doctoral project is funded by the European Union's Horizon 2020 research and innovation programme (TSAR, grant agreement No 964931).

Constraints and risks

None

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